You are wrong on some points.
Many would argue that Sony supported the PS3 in the last 2-3 years better than Microsoft. You can see that in the exclusives.
Microsoft made only:
1.Gears of War Judgment
2.Halo 4
Sony instead made:
1.The Last of Us
2.Beyond Two Souls
3.God of War Ascension
4.Gran Turismo 6
5.Sly Cooper 4
6.Playstation All Stars Battle royale
7.Starhawk
8.Twisted Metal
9.Ratchet & Clank Into the Nexus
10.Pupeteer
11.Rain
12.Little Big Planet Karting
etc...
Also, Microsoft got its fans timed exclusivity/dlc. While Sony got permanent exclusivity for its fans. Examples of multiplatform PS3 versions:
Dead Space 2 included the full game of Dead Space Extraction
Bioshock Infinite included the full game of the original Bioshock
Assassin's Creed IV included 1 full hour of permanent exclusive content
Batman Arkham Assylum had the Joker as playable for challenges
Also, the indie games that appeared on Sony's console like Journey, Flower, Unfinished Swan, Papo &Yo, Sound Shapes, etc... are now owned by Sony. Microsoft's Fez, Minecraft, and Bastion are all headed now to Sony's consoles.
etc...
